import Vector2 from '../math/Vector2.js';
import GameObject from '../core/GameObject.js';
/**
 * Configuration for creating a Circle object.
 */
export interface CircleProps {
    /** Unique tag for identification. */
    tag?: string;
    /** Hidden identifier linking runtime object to its source code location. */
    __sourceId?: string;
    /** Initial position of the circle. */
    position: Vector2;
    /** Radius of the circle. */
    radius: number;
    /** Fill colour. */
    colour?: string;
    /** Render order (lower is background). */
    zIndex?: number;
    /** Whether the circle is initially visible. */
    visible?: boolean;
    /** Initial physics configuration. */
    physics?: {
        velocity?: Vector2;
        acceleration?: Vector2;
        mass?: number;
        isStatic?: boolean;
        restitution?: number;
        friction?: number;
        isSensor?: boolean;
    };
}
/**
 * A basic circle shape that can be drawn to the screen.
 */
export default class Circle extends GameObject {
    /** Radius of the circle in local space. */
    radius: number;
    /** Fill colour (CSS colour string). */
    colour: string;
    /**
     * The centre point of the circle in world space.
     */
    get centre(): Vector2;
    /**
     * The radius of the circle in world space (accounting for scale).
     */
    get worldRadius(): number;
    /**
     * initialises a new instance of a Circle.
     * @param props Configuration properties for the circle.
     */
    constructor(props: CircleProps);
}